Plans for this peninsula included houses, the United Nations Headquarters, and a nuclear power plant. When none of them worked out, it became an expansive park.

These whimsical works of art tell the story of the city's past and present.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

One Portuguese poet described this cape, the westernmost point in mainland Europe, as "where the land ends and the sea begins."

The place where Samuel "Slater the Traitor" brought the Industrial Revolution to America.

Skyscraper powered by wind turbines attached between its towers.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

This historic patch of real estate offers a glimpse of colonial Boston.

This century-old grotesque has a mysterious history and may not actually be a rabbit.

A close look at the church's walls reveals pieces of Mexico's history.

Legend has it that Napoleon Bonaparte fell in love with this Gothic church.

The Habsburgs' royal collections of art and wonders.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

Take a hike to this unique rock formation formed by lava flows.

A two-way chairlift system between Zugliget and the highest point in the city.

The remains of an entire Roman city can be explored in this interactive museum.

This quiet, unassuming spot in Budapest was the birthplace of the bloody 1956 Hungarian Revolution.

The world’s first statue of the late Apple co-founder.

This easily overlooked memorial immortalizes the scars from the 1956 Hungarian Revolution.

The geographical center of Budapest is marked with a 10-foot-tall stylized zero.

This quaint Hungarian railway system is operated exclusively by children between the ages of 10 and 14.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.